keyword
MENU ▼
Read by QxMD icon Read
search

Metal ion

keyword
https://www.readbyqxmd.com/read/29783109/anti-inflammatory-potential-of-alginic-acid-from-sargassum-horneri-against-urban-aerosol-induced-inflammatory-responses-in-keratinocytes-and-macrophages
#1
I P Shanura Fernando, Thilina U Jayawardena, K K Asanka Sanjeewa, Lei Wang, You-Jin Jeon, Won Woo Lee
The airborne particulate pollutants originating in the deserts of Mongolia and China which becomes contaminated with industrial effluents and traffic emissions while moving with the wind currents towards East Asia has recently become a serious environmental and health issue in the region. They cause asthma, collateral lung tissue damage, oxidative stress, allergic reactions, and inflammation. The current study was undertaken to evaluate the protective effects of alginate extracted from the invasive alga Sargassum horneri (SHA) against fine dust collected from Beijing, China (Chinese fine dust; CFD)...
May 18, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29783108/a-new-perspective-to-aberrations-caused-by-barium-and-vanadium-ions-on-lens-culinaris-medik
#2
Murat Çanlı
This study investigates aberrations caused by barium and vanadium on meristematic cells of Lens culinaris Medik. Barium and vanadium ions at various concentrations (0.05 M, 0.1 M, 0.25 M, 0.5 M, and 1.0 M) were exposed to the seeds of the plant at fixed time interval (12 h). After seedlings, with a microscopic examination images were captured about the root tips. Those images showed that several abnormalities occurred on the plant such as chromosome breakings, chromosome dispersion, bridge chromosome, chromosome adherence, ring chromosome...
May 18, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29783082/multiplexed-aptasensor-based-on-metal-ions-labels-for-simultaneous-detection-of-multiple-antibiotic-residues-in-milk
#3
Falan Li, Yemin Guo, Xiangyou Wang, Xia Sun
A dual-target electrochemical aptasensor was developed for the simultaneous detection of multiple antibiotics based on metal ions as signal tracers and nanocomposites as signal amplification strategy. Metal ions such as Cd2+ and Pb2+ could generate distinct differential pulse voltammetry (DPV) peaks. When targets were present, kanamycin (KAN) and streptomycin (STR) as models, the KAN aptamer (KAP) and STR aptamer (STP) were released from their complementary strands, with more change of Cd2+ and Pb2+ corresponding to peak currents...
April 13, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29782982/process-optimization-purification-and-characterization-of-a-novel-acidic-thermostable-chitinase-from-humicola-grisea
#4
Manish Kumar, Amandeep Brar, V Vivekanand, Nidhi Pareek
An extracellular acidic and thermostable chitinase (HgChi) from thermophilic Humicola grisea was purified and characterized. Enhancement in chitinase production (Qp  = 2.9662 Ul-1  h-1 ) was achieved through derivation of optimum fermentation conditions via central composite design. H. grisea observed to produce various isoforms of chitinase, among which the major expressed form has molecular mass of about 50 kDa. Purified chitinases exhibited optimal activity at pH 3.0 and 70 °C. Chitinase showed notable stability at increasing temperatures...
May 18, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29782798/regulatory-activities-of-dopamine-and-its-derivatives-towards-metal-free-and-metal-induced-amyloid-%C3%AE-aggregation-oxidative-stress-and-inflammation-in-alzheimer-s-disease
#5
Eunju Nam, Jeffrey S Derrick, Seunghee Lee, Juhye Kang, Jiyeon Han, Shin Jung C Lee, Su Wol Chung, Mi Hee Lim
A catecholamine neurotransmitter, dopamine (DA), is suggested to be linked to the pathology of dementia; however, the involvement of DA and its structural analogues in the pathogenesis of Alzheimer's disease (AD), the most common form of dementia, composed of multiple pathogenic factors has not been clear. Herein, we report that DA and its rationally designed structural derivatives (1-6) based on DA's oxidative transformation are able to modulate multiple pathological elements found in AD [ i.e., metal ions, metal-free amyloid-β (Aβ), metal-bound Aβ (metal-Aβ), and reactive oxygen species (ROS)], with demonstration of detailed molecular-level mechanisms...
May 21, 2018: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/29782793/zinc-ii-histidine-induced-collagen-peptide-assemblies-morphology-modulation-and-hydrolytic-catalysis-evaluation
#6
Yi-Han Ting, Hsuan-Ju Chen, Wan-Jung Cheng, Jia-Cherng Horng
Collagen-related materials have many potential biomedical applications because of their high biocompatibility and biodegradability. Designed collagen-mimetic peptides (CMPs) could self-assemble into supramolecular structures via a variety of interactions. In particular, metal-ligand interactions can induce microscale sizes of collagen assemblies. Our previous study also successfully applied metal-histidine coordination method to promote the self-assembly of CMPs into micrometers of constructs. In an effort to broaden the metal-induced strategies on assembling designed CMPs and explore the new insights into their assembly process, herein we designed and synthesized a series of short CMPs with one or more histidine residues incorporated into the peptides and used Zn(II) to induce the formation of collagen assembled microstructures...
May 21, 2018: Biomacromolecules
https://www.readbyqxmd.com/read/29782694/metal-organic-framework-hybrid-assisted-formation-of-co-3-o-4-co-fe-oxide-double-shelled-nanoboxes-for-enhanced-oxygen-evolution
#7
Xiao Wang, Le Yu, Bu Yuan Guan, Shuyan Song, Xiong Wen David Lou
Rational design of complex metal-organic framework (MOF) hybrid precursors offers a great opportunity to construct various functional nanostructures. Here, a novel MOF-hybrid-assisted strategy to synthesize Co3 O4 /Co-Fe oxide double-shelled nanoboxes is reported. In the first step, zeolitic imidazolate framework-67 (ZIF-67, a Co-based MOF)/Co-Fe Prussian blue analogue (PBA) yolk-shell nanocubes are formed via a facile anion-exchange reaction between ZIF-67 nanocube precursors and [Fe(CN)6 ]3- ions at room temperature...
May 21, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29782667/synergies-of-electrochemical-metallization-and-valance-change-in-all-inorganic-perovskite-quantum-dots-for-resistive-switching
#8
Yan Wang, Ziyu Lv, Qiufan Liao, Haiquan Shan, Jinrui Chen, Ye Zhou, Li Zhou, Xiaoli Chen, Vellaisamy A L Roy, Zhanpeng Wang, Zongxiang Xu, Yu-Jia Zeng, Su-Ting Han
The in-depth understanding of ions' generation and movement inside all-inorganic perovskite quantum dots (CsPbBr3 QDs), which may lead to a paradigm to break through the conventional von Neumann bottleneck, is strictly limited. Here, it is shown that formation and annihilation of metal conductive filaments and Br- ion vacancy filaments driven by an external electric field and light irradiation can lead to pronounced resistive-switching effects. Verified by field-emission scanning electron microscopy as well as energy-dispersive X-ray spectroscopy analysis, the resistive switching behavior of CsPbBr3 QD-based photonic resistive random-access memory (RRAM) is initiated by the electrochemical metallization and valance change...
May 21, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29782158/fluorescigenic-magnetofluids-based-on-gadolinium-terbium-and-dysprosium-containing-imidazolium-salts
#9
Kun-Lun Cheng, Wen-Li Yuan, Ling He, Ning Tang, Hong-Mei Jian, Ying Zhao, Song Qin, Guo-Hong Tao
Multistimuli responsive soft materials are urgently needed in many different fields, such as anticounterfeiting technology and microdroplet manipulation. Herein, the straightforward preparation of fluorescigenic magnetofluids by the introduction of the paramagnetic metal ions Gd3+ , Tb3+ , and Dy3+ into alkylimidazolium-based ionic liquids (ILs) is reported. Bright visible fluorescence was observed under UV irradiation for Tb- and Dy-containing ILs. Either pure samples or papers coated with these ILs exhibited pronounced magnetic responses...
May 21, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29782146/multiscale-interfacial-strategy-to-engineer-mixed-metal-oxide-anodes-towards-an-enhanced-cycling-efficiency
#10
Yue Ma, Cheuk-Wai Tai, Shaowen Li, Kristina Edstrom, Bingqing Wei
Interconnected macro/mesoporous structures of mixed metal oxide (MMO) are developed on nickel foam as free-standing anodes for Li-ion batteries. The sustainable production is realized via a wet chemical etching process with bio-friendly chemicals. By means of the divalent iron doping during an in-situ re-crystallization process, the as-developed MMO anodes exhibit the enhanced levels of cycling efficiency. Furthermore, this atomic-scale modification coherently synergies with the encapsulation layer across a micrometer scale...
May 21, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29782030/the-genomes-of-three-bradyrhizobium-sp-isolated-from-root-nodules-of-lupinus-albescens-grown-in-extremely-poor-soils-display-important-genes-for-resistance-to-environmental-stress
#11
Camille E Granada, Luciano K Vargas, Fernando Hayashi Sant'Anna, Eduardo Balsanelli, Valter Antonio de Baura, Fábio de Oliveira Pedrosa, Emanuel Maltempi de Souza, Tiago Falcon, Luciane M P Passaglia
Lupinus albescens is a resistant cover plant that establishes symbiotic relationships with bacteria belonging to the Bradyrhizobium genus. This symbiosis helps the development of these plants in adverse environmental conditions, such as the ones found in arenized areas of Southern Brazil. This work studied three Bradyrhizobium sp. (AS23, NAS80 and NAS96) isolated from L. albescens plants that grow in extremely poor soils (arenized areas and adjacent grasslands). The genomes of these three strains were sequenced in the Ion Torrent platform using the IonXpress library preparation kit, and presented a total number of bases of 1,230,460,823 for AS23, 1,320,104,022 for NAS80, and 1,236,105,093 for NAS96...
May 17, 2018: Genetics and Molecular Biology
https://www.readbyqxmd.com/read/29781199/smart-sensing-methodology-for-object-identification-using-circularly-polarized-luminescence-from-coordination-driven-self-assembly
#12
Yuki Imai, Yuka Nakano, Tsuyoshi Kawai, Junpei Yuasa
This work demonstrates a potential use of circularly polarized luminescence for object identification methodology in a sensor application. Towards this aim, we have developed new luminescence probes using pyrene derivatives as sensor luminophores. The probes [(R,R)- and (S,S)-Im2Py] contain two chiral imidazole moieties at 1,6-positions through ethynyl spacers (the angle between the spacers is close to 180°). The probe molecules spontaneously self-assemble into chiral stacks (P or M helicity) upon coordination to metal ions with tetrahedral coordination preference (e...
May 21, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29781031/spectroscopic-evidence-for-hydration-and-dehydration-of-lipid-bilayers-upon-interaction-with-metal-ions-a-new-physical-insight
#13
Soumya Kanti De, Nishu Kanwa, Mirajuddin Ahamed, Anjan Chakraborty
In this manuscript, we investigate the interactions of different metal ions with zwitterionic phospholipid bilayers of different chain lengths using the well-known membrane probe PRODAN and steady state and time resolved fluorescence spectroscopy. We used three zwitterionic lipids that are widely different in their phase transition temperature, namely, dipalmitoylphosphatidylcholine (DPPC), 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC), and 2-oleoyl-1-palmitoyl-sn-glycero-3-phosphocholine (POPC) and salts of zinc (Zn), calcium (Ca) and magnesium (Mg)...
May 21, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29780678/meteoric-metal-chemistry-in-the-martian-atmosphere
#14
J M C Plane, J D Carrillo-Sanchez, T P Mangan, M M J Crismani, N M Schneider, A Määttänen
Recent measurements by the Imaging Ultraviolet Spectrograph (IUVS) instrument on NASA's Mars Atmosphere and Volatile EvolutioN mission show that a persistent layer of Mg+ ions occurs around 90 km in the Martian atmosphere but that neutral Mg atoms are not detectable. These observations can be satisfactorily modeled with a global meteoric ablation rate of 0.06 t sol-1 , out of a cosmic dust input of 2.7 ± 1.6 t sol-1 . The absence of detectable Mg at 90 km requires that at least 50% of the ablating Mg atoms ionize through hyperthermal collisions with CO2 molecules...
March 2018: Journal of Geophysical Research. Planets
https://www.readbyqxmd.com/read/29780474/a-promising-bulky-anion-based-lithium-borate-salt-for-lithium-metal-batteries
#15
Lixin Qiao, Zili Cui, Bingbing Chen, Gaojie Xu, Zhonghua Zhang, Jun Ma, Huiping Du, Xiaochen Liu, Suqi Huang, Kun Tang, Shanmu Dong, Xinhong Zhou, Guanglei Cui
A new salt of lithium trifluoro(perfluoro- tert -butyloxyl)borate (LiTFPFB) which possesses a bulky fluoroalkoxyl functional group in the borate anion has been synthesized for high energy lithium metal batteries. The presence of the bulky fluoroalkoxyl group in the borate anion of LiTFPFB can facilitate ion dissociation and in situ generate a protective film on the Li anode. As a result, LiTFPFB possesses a dramatically improved ionic conductivity and LiFePO4 /Li cells using 1.0 M LiTFPFB/PC electrolyte exhibit improved capacity retention especially upon cycling at elevated temperature (60 °C)...
April 14, 2018: Chemical Science
https://www.readbyqxmd.com/read/29780467/computational-evaluation-of-metal-pentazolate-frameworks-inorganic-analogues-of-azolate-metal-organic-frameworks
#16
Mihails Arhangelskis, Athanassios D Katsenis, Andrew J Morris, Tomislav Friščić
Pentazolate is the ultimate all-nitrogen, inorganic member of the azolate series of aromatic 5-membered ring anions. As an azolate ligand, it has the potential to form open framework structures with metal ions, that would be inorganic analogues of azolate metal-organic frameworks formed by its congeners. However, while the low stability and elusive nature of the pentazolate ion have so far prevented the synthesis of such frameworks, computational studies have focused on pentazolate exclusively as a ligand that would form discrete metallocene structures...
April 7, 2018: Chemical Science
https://www.readbyqxmd.com/read/29780459/folding-mechanisms-steer-the-amyloid-fibril-formation-propensity-of-highly-homologous-proteins
#17
Gaetano Malgieri, Gianluca D'Abrosca, Luciano Pirone, Angelo Toto, Maddalena Palmieri, Luigi Russo, Michele Francesco Maria Sciacca, Rosarita Tatè, Valeria Sivo, Ilaria Baglivo, Roksana Majewska, Massimo Coletta, Paolo Vincenzo Pedone, Carla Isernia, Mario De Stefano, Stefano Gianni, Emilia Maria Pedone, Danilo Milardi, Roberto Fattorusso
Significant advances in the understanding of the molecular determinants of fibrillogenesis can be expected from comparative studies of the aggregation propensities of proteins with highly homologous structures but different folding pathways. Here, we fully characterize, by means of stopped-flow, T-jump, CD and DSC experiments, the unfolding mechanisms of three highly homologous proteins, zinc binding Ros87 and Ml153-149 and zinc-lacking Ml452-151 . The results indicate that the three proteins significantly differ in terms of stability and (un)folding mechanisms...
April 7, 2018: Chemical Science
https://www.readbyqxmd.com/read/29780433/influence-of-metal-deposition-and-activation-method-on-the-structure-and-performance-of-carbon-nanotube-supported-palladium-catalysts
#18
Wouter S Lamme, Jovana Zečević, Krijn P de Jong
The effects of the metal deposition and activation methods on metal particle size and distribution were investigated for carbon nanotube supported Pd catalysts. The Pd precursor was loaded by incipient wetness impregnation, ion adsorption, and deposition precipitation and was activated by thermal treatment under a nitrogen atmosphere or in the liquid phase by reduction by formaldehyde or sodium borohydride. Regardless of the metal precursor loading method, activation under a N2 atmosphere at 500 °C led to homogeneously distributed 4 nm Pd particles...
April 9, 2018: ChemCatChem
https://www.readbyqxmd.com/read/29779079/preparation-and-adsorption-characteristics-for-heavy-metals-of-active-silicon-adsorbent-from-leaching-residue-of-lead-zinc-tailings
#19
Chang Lei, Bo Yan, Tao Chen, Xian-Ming Xiao
To comprehensively reuse the leaching residue obtained from lead-zinc tailings, an active silicon adsorbent (ASA) was prepared from leaching residue and studied as an adsorbent for copper(II), lead(II), zinc(II), and cadmium(II) in this paper. The ASA was prepared by roasting the leaching residue with either a Na2 CO3 /residue ratio of 0.6:1 at 700 °C for 1 h or a CaCO3 /residue ratio of 0.8:1 at 800 °C for 1 h. Under these conditions, the available SiO2 content of the ASA was more than 20%. The adsorption behaviors of the metal ions onto the ASA were investigated and the Langmuir, Freundlich, and Dubinin-Radushkevich isotherm models were used to analyze the adsorption isotherm...
May 19, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29779062/synthesis-and-characterization-of-silibinin-phenanthroline-neocuproine-copper-ii-complexes-for-augmenting-bone-tissue-regeneration-an-in-vitro-analysis
#20
Subramaniyam Rajalakshmi, Selvaraj Vimalraj, Sekaran Saravanan, Desingh Raj Preeth, Manickaraj Shairam, Dhanasekaran Anuradha
In the recent decades, flavonoid metal complexes have been widely investigated for their multifaceted role in enabling osteoblast differentiation and bone formation. Silibinin complexed with copper(II) ion has been synthesized along with two mixed ligand complexes, namely copper(II) silibinin-phenanthroline and neocuproine as co-ligands, and their positive role in promoting neovacularization and osteoblast differentiation was investigated. Silibinin mono complex [Cu(sil)(H2 O)2 ] and [Cu(sil)(phen)] showed similar UV-visible absorption in the region of 315 and 222 nm, whereas Cu(silibinin)(neocuproine) [Cu(sil)(neo)] showed a blueshift in the 320 nm transition...
May 19, 2018: Journal of Biological Inorganic Chemistry: JBIC
keyword
keyword
15375
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"